#include <REGX52.H>
unsigned char NixieTable[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};
void Delay(unsigned int xms);
void Nixie(unsigned char Location,Number);
void main()
{
	while(1)
	{
		Nixie(1,1);
		Nixie(2,2);
		Nixie(3,3);
	}

}

void Nixie(unsigned char Location,Number)
{
	switch(Location)
	{
		case 1:P2_4 = 1; P2_3 = 1; P2_2 = 1;break;
		case 2:P2_4 = 1; P2_3 = 1; P2_2 = 0;break;
		case 3:P2_4 = 1; P2_3 = 0; P2_2 = 1;break;
		case 4:P2_4 = 1; P2_3 = 0; P2_2 = 0;break;
		case 5:P2_4 = 0; P2_3 = 1; P2_2 = 1;break;
		case 6:P2_4 = 0; P2_3 = 1; P2_2 = 0;break;
		case 7:P2_4 = 0; P2_3 = 0; P2_2 = 1;break;
		case 8:P2_4 = 0; P2_3 = 0; P2_2 = 0;break;
	}
	P0 = NixieTable[Number];
	Delay(1);
	P0 = 0x00;
}

void Delay(unsigned int xms)
{
	unsigned char i, j;
	while(xms)
	{
		xms--;
		i = 12;
		j = 169;
		do
		{
			while (--j);
		} while (--i);
		}

}
